Year: 2013
Type: article
Abstract: Cosmicflows-2 is a compilation of distances and peculiar velocities for over 8000 galaxies. Numerically the largest contributions come from the luminosity–line width correlation for spirals, the Tully–Fisher relation (TFR), and the related fundamental plane relation for E/S0 systems, but over 1000 distances are contributed by methods that provide more accurate individual distances: Cepheid, tip of the red giant branch (TRGB), surface brightness fluctuation, Type Ia supernova, and several miscellaneous but accurate procedures. Our collaboration is making important contributions to two of these inputs: TRGB and TFR. A large body of new distance material is presented. In addition, an effort is made to ensure that all the contributions, both our own and those from the literature, are on the same scale. Overall, the distances are found to be compatible with a Hubble constant H 0 = 74.4 ± 3.0 km s −1 Mpc −1 . The great interest going forward with this data set will be with velocity field studies. Cosmicflows-2 is characterized by a great density and high accuracy of distance measures locally, falling to sparse and coarse sampling extending to z = 0.1.
Source: The Astronomical Journal
Authors: R. Brent Tully, Hélène M. Courtois, Andrew E. Dolphin, J. Richard Fisher, Philippe Héraudeau, Bradley A. Jacobs, Igor D. Karachentsev, Dmitry Makarov, Lidia Makarova, Sofia Mitronova, Luca Rizzi, Edward J. Shaya, Jenny G. Sorce, Po-Feng Wu
Institutions: University of Hawaiʻi at Mānoa, University of Hawaii System, Lyon 1 Université, Institute of Nuclear Physics of Lyon, RTX (United States), National Radio Astronomy Observatory, University of Bonn, Special Astrophysical Observatory, W.M. Keck Observatory, University of Maryland, College Park
Language: Hebrew
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1989922688